Bug 25159: Add ability to specify a pre-modified version of action log data and store...

Bug 25159: Add ability to specify a pre-modified version of action log data and store as diff

Test Plan:
1) sudo cpanm Struct::Diff
2) prove t/db_dependent/Log.t

Signed-off-by: Kyle Hall <kyle@bywatersolutions.com>
Signed-off-by: Andrew Fuerste-Henry <andrewfh@dubcolib.org>
Signed-off-by: Emmi Takkinen <emmi.takkinen@koha-suomi.fi>
Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>
Signed-off-by: Katrin Fischer <katrin.fischer@bsz-bw.de>